You can find one here on the Cambridge X-ray crystallography course website:
 http://www-structmed.cimr.cam.ac.uk/Course/Fitting/fittingtalk.html

On Fri, Dec 4, 2009 at 8:25 PM, Brad Bennett <bradbennet...@gmail.com>wrote:

> Hi all-
> I recall seeing a long time ago a figure which showed the progressive
> improvement of electron density as one increases resolution, say from 6 to
> 3.5 to 2A. I believe I've seen two versions- one a larger scale pic showing
> the ability to model side chains of alpha helices at higher resolutions and
> the other a simpler graphic of a tyrosine aromatic ring showing the electron
> density hole in the middle of the ring once near atomic resolution maps are
> obtained. Does anyone have, in their teaching notes or a textbook or
> presentation, a graphic which displays this? I need it for a talk this
> weekend and Google searches have come up blank. If all else fails, I can
> generate it myself...(lazy sigh)
>
> Thanks in advance-
> Brad
>



-- 
Jim Fairman, Ph D.
Post-Doctoral Fellow
National Institutes of Health - NIDDK
Cell: 1-865-748-8672
Lab: 1-301-594-9230
E-mail: fairman....@gmail.com james.fair...@nih.gov

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